Finding the Fourth Proportional to 9,136.41, 12,607.97 and 5,157.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,136.41 : 12,607.97 = 5,157.89 : x
2. Step 2: Convert to fraction form
   9,136.41/12,607.97 = 5,157.89/x
3. Step 3: Cross multiply
   9,136.41x = 12,607.97 × 5,157.89
4. Step 4: Simplify right side
   9,136.41x = 65,030,522.38
5. Step 5: Solve for x
   x = 65,030,522.38/9,136.41
6. Step 6: Final answer
   x = 7,117.73